927399816191 has 2 divisors, whose sum is σ = 927399816192. Its totient is φ = 927399816190.

The previous prime is 927399816169. The next prime is 927399816221. The reversal of 927399816191 is 191618993729.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-927399816191 is a prime.

It is a super-2 number, since 2×927399816191² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (927399816121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 463699908095 + 463699908096.

It is an arithmetic number, because the mean of its divisors is an integer number (463699908096).

Almost surely, 2^927399816191 is an apocalyptic number.

927399816191 is a deficient number, since it is larger than the sum of its proper divisors (1).

927399816191 is an equidigital number, since it uses as much as digits as its factorization.

927399816191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 65.

Adding to 927399816191 its sum of digits (65), we get a square (927399816256 = 963016²).

The spelling of 927399816191 in words is "nine hundred twenty-seven billion, three hundred ninety-nine million, eight hundred sixteen thousand, one hundred ninety-one".